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3月21日是春分,古时称为“日夜分”。这一天,太阳直射赤道,南、北半球的白昼和黑夜都一样长,所以,谚语中有“春分秋分,昼夜平分”的说法。过了春分,北半球黑夜越来越短,而白天逐渐增长。我省本节气平均气温在0℃以上;最高气温可达20℃以上,而最低气温不到O℃,早晚常见霜冻。本节气降水量有所增加,南部降雨,北部降雪。风力加大,南风增多,土壤水分蒸发快。
March 21 is the vernal equinox, ancient times called “day and night points.” On this day, the sun is directly on the equator. The daytime and night of the southern and northern hemispheres are as long as the night, so the saying goes that “equinoxes are divided equally between day and night.” After the vernal equinox, the darkness of the northern hemisphere became shorter and shorter, while the daytime gradually increased. The average temperature in our province is above 0 ℃; the maximum temperature can reach above 20 ℃, while the minimum temperature is less than 0 ℃, morning and evening common frost. The amount of solar ebb precipitation increased, rainfall in the south, snowfall in the north. Increased wind, increased southerly, soil moisture evaporates quickly.